Geology Reference
In-Depth Information
Pr
Normal
alkanes
Isoprenoid
hydrocarbons
A
Plant
waxes
?
High-volatile
bituminous coal
Q
Ph
N1
Alkylated
PAHs
Q
N2
B
N3
Coal distillate
generation
temperature
500 °C
N4
Q
UCM
Q
C
Coal Distillate
Generation
Temperature
1000 °C
UCM
UCM
N0
D
P0
Coal tar
generation
temperature
500 °C
PY0
C0
Q
BAP
GHI
E
Coal tar
generation
temperature
1000 °C
Q
Retention time
Figure 11.4.2. GC/FID fingerprints of high-volatile bituminous coal under various states of thermal exposure: (A)
the high-volatile bituminous coal source material contains a homologous series of normal alkanes, isoprenoids with
Pr/Ph > 3, and a broad UCM, (B) and (C) coal distillates formed at 500 and 1000°C, respectively, contain nearly
identical mixtures of alkylated PAHs, an homologous series of normal alkanes, and a broad UCM, (D) and (E) coal
tars formed at 500 and 1000°C, respectively, in a coke oven contained nearly identical mixtures of two- to six-ring
PAHs. The passage of the gaseous coal distillate through a hot-coke bed and contact with oven walls are thought to
catalyze the transformation of saturated to aromatic hydrocarbons with little sensitivity to temperature in the range
of 500
-
1000°C.
